Log-setting mechanism for sawmill head-blocks.



PATENTED JAN. 24, 1905.

1 J. G. KI STLER. LOG SETTING MECHANISM FOR SAWMILL HEAD BLOGKS.

APPLICATION FILED MAY 7, 1904.

2 BE HTS-SHEET 1.

d W J Z M m m W1 A ma 4 a J N,

No. 780,891. I PATENTED JAN. 24, 1905.

J. o. KISTLER. LOG SETTING MECHANISM FOR SAWMILL HEAD BLOCKS.

APPLICATION FILED HAY 7, 1904.

WITNESSES: V INVENTOR 6 J01??? Ci/izlgtlen 3 log-setting attachment applied for use.

Patented January 24, 1905.

PAT NT -OFFICE.

JOHN C. KISTLER, OF CLINTON, MISSOURI.

LOG-SETTING MECHANISM FOR SAWMILL HEAD-B LOCKS- SPEGIFIQATION forming part of Letters Patent No. 780,891, dated January 24, 1905. Application filed May '7, 1904. Serial No. 206,877-

' To all whom it may concern:

Be it known that I, JOHN C. KIs'rLER, residing at Olinton,in the county of Henry and State of Missouri,have invented a new and Improved 5 Log-Setting Mechanism for Sawmill Head- Blocks, of which the following is a specification.

My invention seeks to provide a new and improved log-setting mechanism for sawmill- IO carriages of that typemore especially utilized for changing the position of the log with respect to the saw by raising or lowering the rear side of the log-block or flitch of i timber whereby to conveniently and expeditiously provide for sawing feather-edges or weathervices arranged to grip the rear edge of the log, a single lever-actuated means, and intermediate connections of peculiar construction that transmit movement of the single leveractuated means to a plurality of lifting-clutch 2 5 devices in unison.

In its more subordinate nature my invention consists in certain details of construction and peculiar construction of parts, all of which will be hereinafter fully explained, specific- 0 ally pointed out in the appended claims, and

illustrated in the accompanying drawings, in Which r Figure 1 is a perspective view ofa sawmillcarriage with head-blocks and my improved Fig. 2 is a transverse'section thereof taken on the line 2 2 of Fig. 1. Fig. 3 is a detail perspective view, on an enlarged scale, of the means for rocking the main or clutch-actuating shaft.

Fig. 4 is a detail perspective view of one of the clutches hereinafter described, and Figs. 5 and 6 are detail views illustrating the front and rear brackets hereinafter referred to.

In the drawings, 10 designates the outline or frame of an ordinary type of sawmill-oar- 5 receive the log or block of timber to be cut,

as clearly illustrated in Fig.- 1.

A designates what I hereinafter term the clutch-actuating shaft, which in practice is disposed about one and one-half inches above the bottom of the board or log to be cut and extendsin a plane parallel with the longitudinal axis of the carriage.

The shaftA is journaled in boxes I) 6, formed in brackets that are secured to the head.- blocks or knees B, and in practice the said brackets have adjustment with respect to the block or log, whereby the shaft A can be set D D designate collars, of which there may be two or more, two being shown, and these collars ar'e adjustably mounted on the shaft A and are held fast thereon by the set-screws d, which when loosened permit of sliding the collars D on the shaft A to suit the length of the log block, or flitch oftimber to be sawed.

The collars D eachhave an outwardly-projecting extension D, that terminates in eyes 0?,

the purposes of which will presently appear. E E designate the clutches or log-grapples, each of which consists of a rectangular frame composed of two plates 6 e, the lower outer edges of which are beveled, as at e, and are pivot-studs a, that adjustably engage with a.

series of vertically disposed apertures 6 formed in the back edges of the plates 0 e to provide for adjusting the clutches vertically with respect to their connection with the rockshaft A.

Between the upper ends of the platese c is pivoted a claw-hook 6, the claw 6 of which is adapted to engage the top side of the log or flitch of timber, and it is forced into engagement with the said log or timber and held to its gripping position by a cam-lever 3, which is also projected between the upper ends of the plates 6 e.

The cam-head 3 and the lever 3 is so arranged as to firmly hold the claw 6 in place, and the said lever is held to its adjusted positions by the log-bail 3, which is connected to the upper end of the claw-hook 6, arranged to interlock with the serrated upper edge of the lever 3, as shown.

The front and rear brackets b 6 (shown in detail in Figs. 5 and 6 and which are secured to the front and rear knees of head-blocks) are each formed with a box at the lower rear edge, in which the rock-shaft A is jourv naled, and the said brackets Z2 6 are pivotally hung, as at 6 on the knees or head-block frames and are locked fast to said frame by the bolts g g, that pass through elongated apertures 6 6* in the lower end of the brackets.

By elongating the apertures b If the brackets b b can be readily adjusted to shift the position of the rock-shaft A to suit the work desired. The forward bracket 6 has a bearing 5 in a plane above the bearing for the shaft A, and in the said bearing 5 is journaled a toothed wheel F, that meshes with the segment C on the shaft A, and to the wheel F is connected a lever-handle f, the upper end of which engages a rack f secured to the upper end of the bracket 5 for holding the lever to its adjusted position.

The manner in which my improvement is manipulated in the practical application thereof is as follows: After the log or blockof timber is placed upon the head block the clutches or grapples E are forced into engagement with the under side of the timber and the claws 6 are forced into the upper side of the lumber by pressing down on the lever 3.

/ The sawyer then grasps the handle f and pulls it forward in the direction indicated by the arrow in Fig. 2, which causes the toothed wheel F to impart motion to the segment C in a direction reverse to that indicated by the arrow 20, (see Fig. 2,) which turns the shaft back thereby, rotating the shaft A in a reverse direction, which returns the clutchframes E to their normal or lowermost position and allows the timber to rest upon the carriage at right angles to the saw, it being understood, however, that by reason of the angle cut of the front face of the log or flitch of timber the said front face is again disposed at an angle to the saw. The carriage is then again moved forward. The saw then again cuts a feather-edged board.

I am aware that log-setting mechanisms for sawmill-carriages have heretofore been provided in which a log or block of timber is tilted at an angle with respect to the saw by raising and lowering the front or face side of the log. block, or flitch of timber, and thereby leaves the front or face of the log or flitch of timber adjacent to the saw resting in the base of the head-blocks all the time, which gives it a firm support.

My invention differentiates from what has been heretofore provided, so far as I know, in the peculiar correlative arrangement of the clutch-actuating shaft and means for rocking the said shaft, the manner in which the clutches are connected with the shaft, and the detailed construction of the clutches and the collars that connect them with the said shaft whereby to provide for readily and conveniently raising and lowering the rear or back side of the log, block, or flitch of timber to be sawed, as desired.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a sawmill, in combination with a carriage and the knees or head-blocks; a rockshaft held in a plane parallel with the l0ngitudinal axis of the carriage and mounted upon the head-blocks, log-lifting frames vertically and laterally adjustable with respect to the shaft, connections that join the lower ends of the said frames with the shaft, and means for rocking the shaft and imparting vertical movement to the said frames as the said shaft is rocked, and a means mounted upon the upper ends of the log-lifting frames for gripping the log, as set forth.

2. The combination with the carriage, the knees and the shaft A that extends from one knee to the other and is journaled thereon,and a means for rocking the said shaft; of the collars D adjustably mounted upon the shaft A and provided with forward extensions D; the rectangular frames E, means for connecting the said frames to the extensions D of the collars for vertical adj ustment,said frames E having claws for engaging the under side of the rear edge of the log, claws pivotally mounted in the upper end of the said frames for engaging the upper surface of the log, and means mounted on the said frames for pressing the said claws 6 into engagement with the log, as specified.

3. In a log-setting mechanism for sawmills of the character described, the combination with the knees or head-blocks and the rockshaft; of the frames E connected at their lower ends only to the shaft, said frames hav ing claws for engaging the under and upper edges of the rear end of the log or flitch of timber, the said rock-shaft being mounted on IIO the knees or head-blocks, substantially as shown and described.

41 The combination with the knees or l1eadblocks, the brackets adjustably mounted upon said blocks, a rock-shaft mounted on the said brackets and a means on one of the brackets for locking the said shaft and holding it to its rocked adjustments; of claws for engaging the rear end of the log or flitch of timber and crank members adjustably mounted on the rock-shaft and connected with the said claws, adapted to impart vertical movement thereto as the shaft is rocked as set forth.

5. Inalog-setting mechanism of the character described, the combination with the carriage, the knees, and the rock-shaft A jour.

naled on the knees; of the claws E eachcomprising a pair of plates whose lower ends ter- JOHN o. KISTLER. Witnesses:

H. H. EDMONSON, E; E. DIX. 

